Taking screen scale into account.

Conflicts:
	WhirlyGlobeSrc/WhirlyGlobeLib/src/ViewPlacementGenerator.mm
Merge branch 'develop' of github.com:pablasso/WhirlyGlobe into develop

Conflicts:
	WhirlyGlobeSrc/WhirlyGlobeLib/src/ViewPlacementGenerator.mm
Revert "Test modifications"

This reverts commit 0581d1058a32cc934543ed52f70110648f7b833c.